Summary: The Mulgoa trig station is on top of Rileys Mountain, on the eastern of the Nepean River in the Blue Mountains National Park.

Hidden in the scrub only a few metres from the firetrail on top of Rileys Mountain opposite a tall communications tower is Mulgoa Trig, a traditional concrete trig station constructed on 28 July 1881. The trig gets its name from the Mulgoa people, an Aboriginal clan or mob who spoke the Dharug language, and inhabited the Mulgoa area to the south of Penrith. The word “mulgoa” is believed to mean “black swan”.

The trig is in pretty good condition, with its nameplate intact and standard trigonometric plate on top.

Getting to Mulgoa Trig

It’s an easy 6.5km return bushwalk or mountain bike to the trig station along the Rileys Mountain Track from the gate at the end of Fairlight Road. The trailhead is a 20km (25min drive) from Penrith, or 17km (20min) from the M4 Penrith motorway exit.

Trig Stations around Australia

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